A/C Compressor Regulator Valve (N280), Checking Activation

A/C Compressor Regulator Valve (N280), Checking Activation

• Perform the electrical test of the activation of the A/C compressor regulator valve as described in the Guided Fault Finding for the A/C system using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

• The vehicle electrical system control module (J519) actuates the A/C compressor regulator valve. The request to activate the A/C compressor regulator valve and the necessary current to regulate compressor output to reach the desired temperature at the evaporator. Sent via the data bus from the Climatronic control module (J255) to the vehicle electrical system control module. The vehicle electrical system control module then activates the A/C compressor regulator valve.

• If a malfunction is detected in the activation of the A/C compressor regulator valve, a malfunction is entered in the event memory of the vehicle electrical system control module and the Climatronic control module. When reading out the event memory of the Climatronic control module, you will be prompted to query the event memory of the vehicle electrical system control module using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

• The activation of the A/C compressor regulator valve is displayed in the "read measured values" function of the Guided Fault Finding of the vehicle electrical system control module using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.